EP2463100A1 - Machine de traitement de feuilles, notamment presse à feuilles - Google Patents

Machine de traitement de feuilles, notamment presse à feuilles Download PDF

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Publication number
EP2463100A1
EP2463100A1 EP11188178A EP11188178A EP2463100A1 EP 2463100 A1 EP2463100 A1 EP 2463100A1 EP 11188178 A EP11188178 A EP 11188178A EP 11188178 A EP11188178 A EP 11188178A EP 2463100 A1 EP2463100 A1 EP 2463100A1
Authority
EP
European Patent Office
Prior art keywords
air
sheet
light sources
dryer
nozzles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11188178A
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German (de)
English (en)
Other versions
EP2463100B1 (fr
Inventor
Jochen Jung
Uwe Ernst
Rolf Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP2463100A1 publication Critical patent/EP2463100A1/fr
Application granted granted Critical
Publication of EP2463100B1 publication Critical patent/EP2463100B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0406—Drying webs by radiation
    • B41F23/0413—Infrared dryers

Definitions

  • the invention relates to a sheet-processing machine, in particular sheet-fed printing machine, with a coating unit and one or more combination driers, which act on the freshly painted sheet both with radiant energy in the infrared range and with heated air.
  • Such combination dryers are known per se for drying dispersion paints. They have infrared radiators mostly in the form of thermal radiators, for example carbon radiators, which require preheating times of several seconds and are therefore permanently switched on during the execution of a print job. The switching on and off of such emitters in the cycle of the sheet transport of about 3 to 5 sheets / s is not possible with such emitters.
  • the sheet to be dried is typically blown with hot air at temperatures between 100 ° and 120 ° C. For this purpose, fresh air is used, which is optionally heated after preheating via a heat exchanger with electrical energy to temperatures above 100 ° C.
  • the thermal energy used in these combination dryers is converted only to a proportion well below 20% in evaporation enthalpy.
  • the hot air causes the dryer units and all machine parts in the environment to heat up (heat losses).
  • the hot, humid exhaust air is sucked off and blown out into the open air.
  • the infrared radiators themselves have an "overall efficiency" of about 10 to 40%, depending on how much the substrate and its ink coverage absorbs the electromagnetic energy in the wavelength range of 0.5 to 10 ⁇ m in which the conventional IR radiation sources emit.
  • the thin aqueous dispersion lacquer layer itself absorbs only an insignificant proportion of the radiation power of the infrared radiators used for this purpose.
  • thermal radiators As ceramic tiles, heated metal bands, etc., to shift the emission wavelength in the long-wavelength part of the IR spectrum.
  • the operating temperature of such lamps is still between 500 ° C and 800 ° C, so that by forced and free convection a lot of energy is lost as waste heat from the outset.
  • the sheets must not come into contact with the hot surfaces of the components of the dryer, since paper begins to burn already from 200 ° C. It is also very difficult to keep the heat of the dryers away from other machine components. Abschottrise are practically ineffective. Therefore, sometimes complicated recooling of adjacent machine components are made, which should not be exposed to the heat of the dryer.
  • UV inks and UV coatings are printed and then dried with UV lamps "cold” ie reactive crosslinked.
  • the additional use of hot air is not required for these dryers. Instead, more cooling air is required to cool the UV light sources themselves.
  • WO 2005/093858 describes a flat UV light source, in which a matrix of ultraviolet light emitting diodes is used. These diodes are cooled by air passing through slit-shaped channels between the rows of diodes.
  • UV light sources are not suitable for drying aqueous dispersion coatings.
  • the object of the present invention to propose a combination dryer for the drying of preferably dispersion coatings, in which the energy used is utilized as effectively as possible or which has a particularly good overall efficiency.
  • This object is achieved according to the measures specified in the characterizing part of claim 1, characterized in that the combination dryer contains or contain a plurality of round or polygonal air nozzles, between which narrow-band high-performance infrared light sources are arranged, of which the painted sheet with a total radiation density at least 25 kW / m 2 can be acted upon, wherein the temperature of the passing through the heated air is below 100 ° C, preferably below 80 ° C.
  • the present invention is based on the recognition that most expediently, the energy to be introduced into the dispersion lacquer layer for evaporation of the water almost Completely by matched to the absorption spectrum of the paint infrared radiation and simultaneously directed to the arc blowing air only serves to remove or propagate the released from the infrared radiation from the paint layer water vapor, for which air is relatively low temperature sufficient.
  • the heat transfer coefficient ⁇ can be increased by a factor of at least 2 up to a factor of 5 compared to the known combination driers mentioned at the outset, ie values of ⁇ > 250 W / m 2 K can be achieved. Due to the high air exchange and the strong overflow of the surface of the painted sheet there is no accumulation of water vapor or even a condensation of water vapor (misting), which otherwise could absorb the incident infrared light before it reaches the sheet surface.
  • the hot air used for this purpose is preferably in a temperature range between 40 ° and 80 ° C. This is sufficient for the air to absorb the water vapor escaping from the bow.
  • the wavelength of the infrared light sources is expedient to the absorption bands of the dispersion varnish d. H. tuned to the absorption bands of water at 1.93, 2.7, 4.7 and / or 6.3 microns.
  • the combination dryer sits over a cylinder of the coating unit, ie, the impression cylinder of the coating unit or a subsequent cylinder over which the sheet is transported in the direction of the delivery.
  • high performance blower such as B. side channel blower or turbo peripheral blower or high-pressure centrifugal fans used.
  • blowers are z. B. from the company Gardner Denver Schopfheim GmbH Schopfheim, BR Germany, or from the Fa. Dietz Motoren GmbH + Co. KG in Dettingen u. Teck, BR Germany. They produce a static pressure above 8,000 Pa and deliver air volumes of 1,000 to 2,000 m 3 / h, whereby the amount of air can be correspondingly increased by using several blowers.
  • the infrared light sources emitting on the absorption bands of water may be IR / diode lasers or diode laser arrays using both edge emitting high power diode lasers and surface emitting diode lasers or laser arrays, for example high power VCSEL laser arrays.
  • IR / diode lasers or diode laser arrays using both edge emitting high power diode lasers and surface emitting diode lasers or laser arrays, for example high power VCSEL laser arrays.
  • fiber-coupled diode lasers it is also possible to use fiber-coupled diode lasers.
  • the infrared emitters are useful semiconductor light sources, they can be format-dependent with an appropriate control and also in the clock of the sheet feed on and off, so that the light sources are turned off during a gap arc, what the efficiency of the dryer alone can improve by a factor of 2 In addition, can be realized with the inventive measures a dryer with significantly shorter length compared to combination dryers of the type mentioned.
  • FIG. 1 shows an offset printing machine 1 in a row construction with a feeder 2, in which the unprinted paper stack 3 is six printing units 8a to 8f for the four primary colors and optionally two other spot colors, a first coating unit 9a, following two dryer units 10a and 10b, a second Painting unit 9b and a boom 5 with the sheet delivery stack 6.
  • the unprinted paper stack 3 is six printing units 8a to 8f for the four primary colors and optionally two other spot colors
  • a first coating unit 9a following two dryer units 10a and 10b
  • a second Painting unit 9b a boom 5 with the sheet delivery stack 6.
  • four further dryer units 11a to 11d are arranged in the sheet transport direction one behind the other.
  • Such a printing press is offered, for example, under the name Speedmaster XL105-6-LYYLX3 by Heidelberger Druckmaschinen AG.
  • the four dryer units 11a to 11d are designed in the manner of plug-in modules, as in the DE 101 18 757 A1 is described. These dryer trays are so-called combination dryer, both with hot air and radiation energy, z. B. IR radiation, act on the sheet to be dried.
  • FIG. 2 is the rear part of the machine after FIG. 1 but now shown with a modified drying line with combination dryers according to the present invention.
  • the coating unit or printing cylinder 119b denoted here by 109b is followed by two transport cylinders 120 and 121, wherein the cylinder 120 is designed as a transferer in a known manner so that the lacquered sheet surface located there does not come into contact with the cylinder surface but via air cushions kept at a distance.
  • the sheet lies with its already dried back side.
  • the cylinders 120 and 121 convey the sheet to a circulating chain gripper system 105, of which the painted sheet in known Way conveyed over the stack 106 and stored there. With 126 a sheet baffle is designated, over which the sheet is pulled away from the chain grippers also by means of air cushions without contact.
  • a combination dryer 111a with a curved nozzle plate adapted to the cylinder radius is arranged at a distance of about 1 cm to about 4 cm (see following numerical embodiments 1 and 2).
  • the structure of this dryer will be described in the following figures.
  • a second combination dryer 111b is associated with the second transport cylinder 121 and mounted there at the same distance from the cylinder surface.
  • a second combination dryer 111c is mounted above the sheet guide plate 126 on the printing cylinder 119b of the coating unit 109b.
  • This combination dryer has a rectangular, flat shape. Otherwise, the same parts are provided with the same reference numerals and will not be explained again.
  • the combination dryer 111b is shown in more detail in section perpendicular to the cylinder axis of the transport cylinder 121. He has a concave, adapted to the curvature or the radius of the cylinder surface shape.
  • FIG. 5 As from the supervision in the clipping after FIG. 5 shown with removed plate 131, it has a plurality of staggered rows of nozzles 134 through which the air can pass.
  • a plurality of high power diode lasers 135 are inserted into the gaps between the nozzles.
  • the diode lasers 135 are designed as so-called "vertically stacked laser bars" (vertical stacks), ie, up to 30, typically 6, 12 or 20, individual bars are mounted on a heat sink.
  • FIG. 7 shows such composed of 12 bars stack.
  • the heat sink is denoted there by 113 and the zone from which the infrared radiation emerges, with 115.
  • Such diode lasers are known per se and are offered, for example, by the company. Dilas in Mainz, DE.
  • the heat sinks 113 of the diode laser 135 in turn are attached to webs 137 ( FIG. 4 ) extending between the nozzle plate 131 and the rear wall 132 of the dryer 111b.
  • the webs 137 like the rear wall 132, are made of aluminum and have good thermal conductivity. Together with this, they form a heat sink for the diode laser bars 135.
  • the coolant channels denoted by 124 through which a coolant flows to dissipate the heat loss produced by the diode lasers 135.
  • plastic tubes 127 are inserted into the nozzle bores of the plate 131. These plastic tubes 127 are connected to one another via a distribution system 128 and are supplied with blowing air from compressors, not shown here, such as the side channel compressors mentioned above, at a pressure of 8000 Pa. The temperature of this blowing air is about 50 ° C.
  • the blown air is heated by means of a water-air heat pump, not shown here, which is connected to the coolant circuit 124 and thus transforms the waste heat of the diode laser from about 25 ° C to a higher temperature level of 50 to 60 ° C and to a heat exchanger, not shown here emits through which the supply air flows.
  • a water-air heat pump not shown here
  • the air is already heated by the adiabatic compression in the side channel compressors by about 7 ° and the Waste heat of the compressor / blower can also be used for heating the blown air.
  • An additional electric heater for heating the blowing air as is common in conventional dryers, can therefore be omitted.
  • the warm blowing air remains thermally isolated from the diode lasers 135 in order not to impair their efficiency.
  • further radiation windows 139 are embedded in a plastic which is transparent to the wavelength of the diode laser, of which the plate 131 or the interior behind it is finished smoothly in order to prevent the penetration of moisture and dirt.
  • the plate 131 or the dryer as a whole forms a sheet guiding body with the exception of the nozzle holes smooth surface, wherein the emerging from the ends of the plastic tubes 127 air flow presses the sheet to be dried on the counter-pressure or transport cylinder 119 b / 121.
  • the number of diode lasers 135 and the distance of the nozzle bores 134 from the surface of the cylinder 121 and the sheet B thereon are selected so that the sheet passed under the dryer is fully intense with infrared radiation is acted upon, while at the same time the turbulent air flow emerging from the plastic tubes 137 blows away from the paint layer of the sheet B exiting water vapor.
  • the vapor-saturated exhaust air has a temperature of about 60 to 70 ° C and is collected on both sides of the dryer as well as transversely to the sheet transport direction via suction ducts 136a and 136b, where it is blown through not shown exhaust ducts either into the open or, in a further development of the invention the water vapor and any solvent contained therein, is condensed out in order to use the exhaust air again.
  • High power infrared diode lasers emitting on the absorption line of water at 1.93 ⁇ m are already known. They are manufactured, for example, by the above-mentioned company Dilas and are described in the article "High-power diode laser modules from 410 - 2200 nm "(authors Bernd Köhler et al.) of Dilas GmbH The single bars have an output power of 15 W, so that when using about 50 stacks of 12 bars each, an infrared power of 9 kW on the absorption line of Water can be achieved.
  • the electrical connections of the high-power diode laser 135 are placed on a socket, which are connected via appropriate cable to a power supply of the dryer control in the supply cabinet for the dryer on the press.
  • the dryer controller provides the output current or output voltage for the diode laser 135 synchronized to the machine angle.
  • the dryer control is in turn connected to the control of the printing press and receives from this in addition to the information about the current machine angle in real time more leading commands delivered.
  • the diode lasers 135 are only supplied with voltage when the lacquered sheet in the diverging cone of the diode laser moves under them.
  • the diode lasers are summarized in groups summarized, d. H.
  • diode lasers in the rows in which the arc "comes later" will be turned on accordingly later.
  • outer groups of the diode lasers can be switched on and off separately from the others. These outer diode lasers are turned off when printing paper smaller than the maximum size.
  • aqueous paper sheets of a grammage of 135 g / m 2 with a coating application of 4 g / m 2 at the printing speed of 4.9 m / s could be predried over the dryer section to a degree of drying of 55%.
  • a dryer of the same construction on the next but one sheet transport cylinder then the continuous sheet reached a degree of drying of 98%.
  • nozzle array 1672 nozzles in 22 rows of 76 nozzles each Diameter of the nozzles 2 mm Nozzle cross-section of a single nozzle 3.14 mm 2 Nozzles total cross section 5250 mm 2 Distance between the nozzles / nozzle rows 14 mm blowing temperature 50 ° C blowoff 120 m / s Air flow V_pkt 2270 m 3 / h Distance nozzle opening - paper sheet 1 cm Infrared radiation power at ⁇ 1.93 ⁇ m 20 kW Width of the dryer zone 105 cm Length of the dryer zone 30 cm irradiance 67 kW / m 2 V_pkt / A 7570 m 3 [air] / (m 2 h) Heat transfer coefficient ⁇ 620 W / m 2 K Ratio of radiation density / V_pkt / A 8.8 Wh / m 3
  • drying towers 10a and 10b arranged after the first coating unit 9a can also be used in FIG. 1 shown printing press with the dryers 111a and 111b according to the invention are equipped by z. B. the dryer is arranged there above the sheet transport cylinder 20a. With suitable dimensioning of the dryer z. B. according to Example 2, then the drying tower 10b completely eliminated.
  • diode laser arrays can be used which directly adjoin one another over the entire sheet width and alternate with corresponding rows of nozzles in the sheet running direction, as in FIG FIG. 6 outlined.
  • the infrared light output can also be guided via optical fibers to the dryer, where their ends are then fixed in the plate 131.
  • the high-power diode lasers can be arranged in the dryer supply cabinet of the printing press.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Drying Of Solid Materials (AREA)
EP11188178.5A 2010-12-03 2011-11-08 Machine de traitement de feuilles, notamment presse à feuilles Active EP2463100B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010053459 2010-12-03

Publications (2)

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EP2463100A1 true EP2463100A1 (fr) 2012-06-13
EP2463100B1 EP2463100B1 (fr) 2013-07-17

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EP11188178.5A Active EP2463100B1 (fr) 2010-12-03 2011-11-08 Machine de traitement de feuilles, notamment presse à feuilles

Country Status (5)

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US (1) US8707578B2 (fr)
EP (1) EP2463100B1 (fr)
JP (1) JP5992161B2 (fr)
CN (1) CN102555440B (fr)
DE (1) DE102011118175A1 (fr)

Cited By (2)

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DE102021123678A1 (de) 2021-09-14 2023-03-16 Koenig & Bauer Ag Trocknungseinrichtung in einer Druckmaschine und Druckmaschine mit dieser Trocknungseinrichtung
WO2023041262A1 (fr) 2021-09-14 2023-03-23 Koenig & Bauer Ag Presse d'impression à feuilles ayant un séchoir pour le séchage de feuilles imprimées par un dispositif d'impression sans impact

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EP2463100B1 (fr) * 2010-12-03 2013-07-17 Heidelberger Druckmaschinen AG Machine de traitement de feuilles, notamment presse à feuilles
JP6417215B2 (ja) * 2014-12-26 2018-10-31 株式会社シンク・ラボラトリー グラビア印刷装置、インキジェット装置及び水性液体付着物乾燥方法
ES2755848T3 (es) * 2015-11-23 2020-04-23 Koenig & Bauer Ag Procedimiento y dispositivo con módulos y equipos seccionadores para sustratos en forma de pliego
CN107443873B (zh) * 2017-08-14 2022-12-13 上海瑞源印刷设备有限公司 印铁机的清洁装置与片材预热装置的跨连驱动机构
CN107323082B (zh) * 2017-08-14 2023-02-17 上海瑞源印刷设备有限公司 印铁机片材预热装置
CN107393850A (zh) * 2017-08-16 2017-11-24 君泰创新（北京）科技有限公司 太阳能电池浆料的干燥方法及系统
DE102018211588A1 (de) * 2017-10-25 2019-04-25 Heidelberger Druckmaschinen Ag Vorrichtung zum Trocknen eines Bogens
JP7100337B2 (ja) 2018-08-22 2022-07-13 株式会社東通研 水性ニス印刷装置
ES2983953T3 (es) * 2020-07-01 2024-10-28 Bobst Bielefeld Gmbh Máquina de impresión con una unidad de secador
DE102022124767A1 (de) 2022-09-27 2023-09-07 Heidelberger Druckmaschinen Aktiengesellschaft Vorrichtung zum Trocknen von Bedruckstoff

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US6293196B1 (en) 1993-10-06 2001-09-25 Howard W. DeMoore High velocity, hot air dryer and extractor
DE10118757A1 (de) 2000-05-17 2001-11-22 Heidelberger Druckmasch Ag Druckmaschine
US20040060193A1 (en) 2002-10-01 2004-04-01 Bobst Sa Drying device for printed material
WO2005093858A2 (fr) 2004-03-29 2005-10-06 Platsch Gmbh & Co. Kg Source lumineuse a uv plate
DE102007019977A1 (de) 2006-05-17 2007-11-22 Heidelberger Druckmaschinen Ag Vorrichtung zum Trocknen von Bogen in einer Bogendruckmaschine
DE102006032831A1 (de) * 2006-07-14 2008-01-17 Man Roland Druckmaschinen Ag Trocknereinrichtung zur Behandlung einer Bedruckstoffoberfläche in einer Verarbeitungsmaschine
DE102006059025A1 (de) 2006-12-14 2008-06-19 Man Roland Druckmaschinen Ag Verfahren und Vorrichtung zum Trocknen von Bogenmaterial in einer Verarbeitungsmaschine
EP2067620A2 (fr) 2007-12-07 2009-06-10 Heidelberger Druckmaschinen AG Procédé pour sécher une matière imprimée en polychromie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021123678A1 (de) 2021-09-14 2023-03-16 Koenig & Bauer Ag Trocknungseinrichtung in einer Druckmaschine und Druckmaschine mit dieser Trocknungseinrichtung
WO2023041262A1 (fr) 2021-09-14 2023-03-23 Koenig & Bauer Ag Presse d'impression à feuilles ayant un séchoir pour le séchage de feuilles imprimées par un dispositif d'impression sans impact
US11897251B2 (en) 2021-09-14 2024-02-13 Koenig & Bauer Ag Sheet-fed printing press having a dryer for drying sheets printed by a non-impact printing device

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JP5992161B2 (ja) 2016-09-14
US8707578B2 (en) 2014-04-29
CN102555440B (zh) 2016-08-17
DE102011118175A1 (de) 2012-06-06
US20120137537A1 (en) 2012-06-07
CN102555440A (zh) 2012-07-11
JP2012121327A (ja) 2012-06-28
EP2463100B1 (fr) 2013-07-17

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